feat(阶段四): 实现 SOP 模板导入导出功能

- 创建导出 Action（ExportSopTemplateAction）
- 创建导入 Action（ImportSopTemplateAction）
- 支持导出为 JSON 格式
- 支持从 JSON 文件导入
- 导入时验证文件格式和数据有效性
- 导入成功后跳转到编辑页面
- 文件大小限制 5MB

app/Filament/Actions/ExportSopTemplateAction.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Filament\Actions;
+
+use App\Models\SopTemplate;
+use App\Services\SopTemplateService;
+use Filament\Actions\Action;
+use Filament\Notifications\Notification;
+use Illuminate\Support\Facades\Response;
+
+class ExportSopTemplateAction extends Action
+{
+    public static function getDefaultName(): ?string
+    {
+        return 'export';
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->label('导出模板');
+
+        $this->icon('heroicon-o-arrow-down-tray');
+
+        $this->color('info');
+
+        $this->action(function (SopTemplate $record) {
+            $service = app(SopTemplateService::class);
+            $json = $service->exportToJson($record);
+
+            $fileName = sprintf(
+                'sop_template_%s_%s.json',
+                $record->id,
+                now()->format('YmdHis')
+            );
+
+            Notification::make()
+                ->title('导出成功')
+                ->body('SOP 模板已成功导出')
+                ->success()
+                ->send();
+
+            return Response::streamDownload(function () use ($json) {
+                echo $json;
+            }, $fileName, [
+                'Content-Type' => 'application/json',
+            ]);
+        });
+    }
+}

app/Filament/Actions/ImportSopTemplateAction.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace App\Filament\Actions;
+
+use App\Services\SopTemplateService;
+use Filament\Actions\Action;
+use Filament\Forms;
+use Filament\Notifications\Notification;
+use Illuminate\Validation\ValidationException;
+
+class ImportSopTemplateAction extends Action
+{
+    public static function getDefaultName(): ?string
+    {
+        return 'import';
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->label('导入模板');
+
+        $this->icon('heroicon-o-arrow-up-tray');
+
+        $this->color('success');
+
+        $this->modalHeading('导入 SOP 模板');
+
+        $this->modalDescription('从 JSON 文件导入 SOP 模板');
+
+        $this->modalSubmitActionLabel('导入');
+
+        $this->form([
+            Forms\Components\FileUpload::make('file')
+                ->label('选择文件')
+                ->acceptedFileTypes(['application/json'])
+                ->required()
+                ->maxSize(5120), // 5MB
+        ]);
+
+        $this->action(function (array $data) {
+            try {
+                $filePath = storage_path('app/public/' . $data['file']);
+                $json = file_get_contents($filePath);
+
+                $service = app(SopTemplateService::class);
+                $template = $service->importFromJson($json);
+
+                // 删除临时文件
+                @unlink($filePath);
+
+                Notification::make()
+                    ->title('导入成功')
+                    ->body("SOP 模板「{$template->name}」已成功导入")
+                    ->success()
+                    ->send();
+
+                // 重定向到编辑页面
+                return redirect()->route('filament.admin.resources.sop-templates.edit', ['record' => $template]);
+            } catch (ValidationException $e) {
+                Notification::make()
+                    ->title('导入失败')
+                    ->body($e->getMessage())
+                    ->danger()
+                    ->send();
+
+                throw $e;
+            } catch (\Exception $e) {
+                Notification::make()
+                    ->title('导入失败')
+                    ->body('文件格式错误或数据无效')
+                    ->danger()
+                    ->send();
+
+                throw $e;
+            }
+        });
+    }
+}